(unstack b3 b8)
(putdown b3)
(pickup b8)
(stack b8 b3)
(unstack b2 b5)
(putdown b2)
(unstack b4 b12)
(putdown b4)
(unstack b5 b7)
(stack b5 b2)
(unstack b7 b10)
(stack b7 b4)
(unstack b10 b11)
(stack b10 b8)
(pickup b11)
(stack b11 b7)
(unstack b12 b9)
(stack b12 b11)
(unstack b5 b2)
(stack b5 b10)
(unstack b6 b1)
(stack b6 b12)
(pickup b9)
(stack b9 b2)
; cost = 24 (unit cost)
